Anti-beam-falling device and modular expansion joint

Abstract

The application provides a beam falling prevention device and a modular expansion joint. The beam falling prevention device comprises a sliding plate, a base, a cover plate, a limiting plate, a supporting rod and a rotating part. The supporting rod comprises a first end and a second end. The first end is connected with the rotating part. An arc-shaped groove is formed in the other end of the base. A first opening end surface is formed on the end of the base facing the arc-shaped groove. A first through hole is formed in the cover plate. The arc-shaped groove and the first through hole form a spherical cavity. The rotating part can rotate in the spherical cavity. A second through hole is formed in the limiting plate. The first end passes through the second through hole. There is a gap between the first end and the second through hole. The cover plate is connected with the base. The cover plate prevents the rotating part from falling off when the rotating part rotates in the spherical cavity. The beam falling prevention device is arranged on the modular expansion joint. When the bridge is displaced, the beam falling prevention device better adapts to the expansion displacement of the bridge through the cooperation of the rotating part and the spherical cavity and the cooperation of the supporting rod and the second through hole.

Description

Technical Field

[0001] This invention relates to the field of highway expansion joint technology, and in particular to an anti-falling beam device and a modular expansion joint. Background Technology

[0002] Modular expansion joints are mainly composed of side beams, middle beams, support beams, supports, displacement boxes, and functional elastic elements. Among them, the support beams are the main load-bearing structures of the expansion joints. The support beams are set on the supports and undergo complex movements as the bridge shifts.

[0003] Support beams are typically made of solid steel, hot-rolled I-beams, or welded I-beams. To ensure the support beams can move stably on the supports without slipping, anti-falling beam devices are required. The basic requirements for anti-falling beam devices are: they should not obstruct the movement of the support beams, they should ensure the support beams move in the center of the support, and their performance should be stable and reliable.

[0004] Existing expansion joint anti-fall beam devices mainly include three structural types: metal lateral support type, rubber-coated metal lateral support type, and integral support type. The metal lateral support type uses a metal rod as its limiting mechanism. One end of the metal rod connects to the side plate of the displacement box, and the other end has a certain gap with the crossbeam to accommodate its displacement. Advantages: high structural rigidity; Disadvantages: when the supporting crossbeam undergoes lateral displacement, the gap compresses and becomes smaller, resulting in high frictional resistance upon contact. Furthermore, it cannot guarantee that the supporting crossbeam will always move at the center of the support, leading to structural interference. The rubber-coated metal lateral support type consists of a metal rod with a layer of rubber vulcanized at the end. Its installation position is the same as the metal lateral support type. It utilizes the deformation capacity of the rubber material to meet the crossbeam's displacement requirements, eliminating the need for a pre-reserved gap. It can ensure the crossbeam moves at the center of the elastic element. However, due to the high friction between the rubber and metal, it can affect the movement of the expansion joint. The integral support type uses bolts to integrate the lateral support plate with the support beam and the support. The displacement between the support plate and the beam is achieved by adding additional high-polymer wear-resistant material. The advantage is that it can rotate flexibly and can ensure that the beam moves in the center of the functional elastic element from beginning to end. The disadvantage is that it is only suitable for solid steel structure beams. Summary of the Invention

[0005] In view of this, the present invention aims to propose an anti-fall beam device and a modular expansion joint to solve the problems that the anti-fall beam device has limited application scenarios and cannot guarantee that the supporting beam is always moving at the center of the support, and the movement of the expansion joint is easily disturbed.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] This invention proposes an anti-fall beam device, installed on a modular expansion joint. The anti-fall beam device includes a sliding plate, a base, a cover plate, a limiting plate, a support rod, and a rotating part. The support rod has a first end and a second end, the first end being connected to the rotating part. One end of the base is connected to the sliding plate, and the other end has an arc-shaped groove inside. The end of the base facing the arc-shaped groove forms a first open end face, which is connected to the cover plate. The cover plate has a through first hole inside, the end of the cover plate facing the base is a second open end face, and the end facing away from the base is a third open end face. The first and second open end faces are connected. The arc-shaped groove and the first through hole form a spherical cavity, which accommodates the rotating part and allows it to rotate inside the spherical cavity. The limiting plate has a through second hole inside, which is connected to the third open end face. The first end passes through the second through hole, and there is a gap between the first end and the second through hole. The cover plate is connected to the base, preventing the rotating part from falling off when rotating inside the spherical cavity. The anti-falling beam device of the present invention is installed on a modular expansion joint. When the bridge shifts, the cooperation between the rotating part and the spherical cavity, as well as the cooperation between the support rod and the second through hole, allows the anti-falling beam device to better adapt to the expansion and contraction displacement of the bridge. At the same time, because the rotating part rotates within the spherical cavity, the rotation is more flexible and the force is more evenly distributed.

[0008] Furthermore, the base, cover plate, and limiting plate are connected by connectors, facilitating their assembly. In case of an abnormal situation, the support rod swings and contacts and collides with the limiting plate, using shearing force to cut the connector, causing the limiting plate to detach and thus releasing a larger space and generating a larger displacement angle.

[0009] Furthermore, the connector is beveled at the junction of the cover plate and the limiting plate. By creating this bevel, the shearing force generated when the support rod and the limiting plate contact and collide can quickly cut the connector at the bevel, causing the limiting plate to detach and freeing up more space. This allows the anti-falling beam device to function better in case of abnormal situations.

[0010] Furthermore, the surfaces of the arc-shaped groove and the rotating part are treated with one or more surface treatments, such as thermal spraying of hard alloy or blackening, to protect the arc-shaped groove and improve the service life of the anti-falling beam device during long-term contact and collision between the arc-shaped groove and the rotating part.

[0011] Furthermore, the arc-shaped groove is hemispherical, so that the radius at the opening of the arc-shaped groove is the same as the radius of the first through hole. This not only facilitates the arc-shaped groove and the first through hole to form a spherical cavity, but also makes it easier to assemble the rotating part into the spherical cavity during the manufacturing of the anti-fall beam device.

[0012] Furthermore, the skateboard is made of a polymer material, specifically any one of polytetrafluoroethylene, fiber composite materials, ultra-high molecular weight polyethylene, or modified ultra-high molecular weight polyethylene.

[0013] Furthermore, the slide plate and the base are detachably connected. After wear occurs during prolonged contact and sliding between the slide plate and the first connecting beam, only the slide plate needs to be replaced, avoiding the need to replace the entire anti-fall beam device, thus saving costs.

[0014] This invention also proposes a modular expansion joint, which employs the aforementioned anti-falling beam device. The modular expansion joint includes a displacement box, a support, and a supporting beam, with the supporting beam connected to the displacement box via the support. Two anti-falling beam devices are provided, symmetrically arranged on both sides of the supporting beam. The sliding plate is connected to the supporting beam, and the support rod is connected to the side plate of the displacement box. The symmetrically arranged anti-falling beam devices ensure that the supporting beam always moves in the center position of the support. The anti-falling beam device of this invention is universally applicable, suitable for both I-beam and solid steel supporting beams.

[0015] Compared with existing technologies, the anti-falling beam device and modular expansion joint described in this invention have the following advantages:

[0016] (1) The modular expansion joint of the present invention can meet the needs of bridges under different working conditions and perform graded limiting treatment for different working conditions. The rotating part adopts a spherical structure, which makes the rotation more flexible and the force more uniform. The support rod can achieve a large rotation angle to meet the needs of abnormal working conditions.

[0017] (2) It is universally applicable and can be used for both I-beams and solid steel beams;

[0018] (3) The polymer sliding plate and the supporting beam are in direct contact, resulting in low frictional resistance and the plate can be replaced after wear. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the anti-falling beam device described in this invention;

[0021] Figure 2 for Figure 1 Sectional view in the AA direction;

[0022] Figure 3 for Figure 1 Side view;

[0023] Figure 4This is a structural schematic diagram of the support rod and the rotating part;

[0024] Figure 5 This is a structural schematic diagram of the connector;

[0025] Figure 6 This is a schematic diagram of the modular expansion joint described in this invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Slide plate; 2. Base; 21. First opening end face; 3. Cover plate; 31. Second opening end face; 32. Third opening end face; 4. Limiting plate; 5. Connector; 51. Bevel; 6. Support rod; 61. First end; 62. Second end; 7. Rotating part; 8. Displacement box; 9. Support; 10. Support beam. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The embodiments described herein are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. Example 1

[0030] like Figures 1-6As shown, this invention proposes an anti-falling beam device, which is installed on a modular expansion joint. The anti-falling beam device includes a sliding plate 1, a base 2, a cover plate 3, a limiting plate 4, a support rod 6, and a rotating part 7. The support rod 6 includes a first end 61 and a second end 62. The first end 61 is connected to the rotating part 7. One end of the base 2 is connected to the sliding plate 1, and the other end has an arc-shaped groove. The end of the base 2 facing the arc-shaped groove forms a first open end face 21, which is connected to the cover plate 3. The cover plate 3 has a through first hole inside. The end of the cover plate 3 facing the base 2 is a second open end face 31, and the end away from the base 2 is a third open end face 32. The first open end face 21 and the second open end face 31 are connected. The arc-shaped groove and the first through hole form a spherical cavity. The spherical cavity is used to accommodate the rotating part 7, and the rotating part 7 can rotate inside the spherical cavity. The size of the rotating part 7 is slightly smaller than the spherical cavity to facilitate the rotation of the rotating part 7 within the spherical cavity. The limiting plate 4 has a through-hole, and the limiting plate 4 is connected to the third open end face 32. The first end 61 passes through the second through-hole, and there is a gap between the first end 61 and the second through-hole. The first end 61 of the support rod 6 can deflect within the second through-hole. Specifically, the size of the gap is designed according to the deflection value of the bridge, so that the support rod 6 can meet the bridge's displacement when it deflects within the gap formed with the limiting plate 4. In case of abnormality, the support rod 6 and the limiting plate 4 come into contact and collide, and the limiting plate 4 and the cover plate 3 are separated by shear force, and the limiting plate 4 falls off, thereby generating a larger displacement angle. The cover plate 3 is connected to the base 2, and the cover plate 3 is used to prevent the rotating part 7 from falling off when rotating in the spherical cavity. The anti-fall beam device of the present invention is set on the modular expansion joint. When the bridge is displaced, the cooperation between the rotating part 7 and the spherical cavity, as well as the cooperation between the support rod 6 and the second through-hole, makes the anti-fall beam device better adapt to the expansion and contraction displacement of the bridge. Meanwhile, because the rotating part 7 rotates inside the spherical cavity, the rotation is more flexible and the force is more even.

[0031] Furthermore, the base 2, cover plate 3, and limiting plate 4 are connected by a connector 5, facilitating their assembly. In case of an abnormal situation, the support rod 6 swings and contacts and collides with the limiting plate 4, shearing the connector 5 with shearing force, causing the limiting plate 4 to detach, thus releasing a larger space and generating a larger displacement angle. Further still, the connector 5 is a connecting bolt. The connecting bolt passes sequentially through the limiting plate 4, cover plate 3, and base 2, connecting the three. The base 2 and cover plate 3 are connected, with the arcuate groove of the base 2 and the first through hole of the cover plate 3 forming a spherical cavity, within which the rotating part 7 rotates. The cover plate 3 and limiting plate 4 are connected, with the first end 61 of the support rod 6 inserted into the second through hole of the limiting plate 4. Because the first end 61 is connected to the rotating part 7, the support rod 6 and the rotating part 7 will not detach during rotation.

[0032] Furthermore, the connector 5 is provided with a bevel 51, which is located at the connection between the cover plate 3 and the limiting plate 4. By providing a bevel 51 at this location, after the support rod 6 and the limiting plate 4 come into contact and collide, the resulting shearing force can quickly cut the connector 5 at the bevel 51, causing the limiting plate 4 to fall off, thereby freeing up a larger space so that the anti-falling beam device can function better in the event of an abnormal situation.

[0033] The surfaces of the arc-shaped groove and the rotating part 7 are treated with one or more of the following: thermal spraying hard alloy or blackening. This is to protect the arc-shaped groove and improve the service life of the anti-fall beam device during long-term contact and collision between the arc-shaped groove and the rotating part 7.

[0034] Furthermore, the arc-shaped groove is hemispherical, so that the radius of the arc-shaped groove opening is the same as the radius of the first through hole. This not only facilitates the arc-shaped groove and the first through hole to form a spherical cavity, but also facilitates the assembly of the rotating part 7 into the spherical cavity during the manufacturing of the anti-fall beam device. Example 2

[0035] Based on Embodiment 1, this embodiment proposes a modular expansion joint. The anti-falling beam device is installed on the modular expansion joint. The modular expansion joint includes a displacement box 8, a support 9, and a supporting beam 10, with the supporting beam 10 connected to the displacement box 8 via the support 9. Two anti-falling beam devices are provided, symmetrically arranged on both sides of the supporting beam 10. The sliding plate 1 is connected to the supporting beam 10, and the support rod 6 is connected to the side plate of the displacement box 8, thereby positioning the anti-falling beam device on the modular expansion joint. The symmetrically arranged anti-falling beam devices can always keep the supporting beam 10 in the center position of the support 9. The anti-falling beam device of this invention is universally applicable, suitable for both I-beams and solid steel supporting beams. Specifically, this application... Figure 6 In this design, the supporting beam 10 is I-shaped and includes a first connecting beam and second connecting beams located on both sides of the first connecting beam. The second connecting beam is connected to the displacement box 8 via a support 9. The support rod 6 is connected to the side plate of the displacement box 8, and the sliding plate 1 is connected to the first connecting beam. For modular expansion joints, under the premise of the relevant structure and assembly relationship provided in this application, the modular expansion joint also includes conventional components such as a central beam. Since these are existing technologies, they will not be described in detail here.

[0036] Furthermore, the sliding plate 1 is made of a polymer material, specifically polytetrafluoroethylene (PTFE), fiber composite material, ultra-high molecular weight polyethylene (UHMWPE), or modified UHMWPE. When the supporting beam 10 undergoes longitudinal displacement with the bridge, the supporting beam 10 and the anti-fall beam device slide. The anti-fall beam device utilizes the polymer sliding plate 1 to slide relative to the first connecting beam, reducing frictional resistance. Furthermore, the sliding plate 1 and the base 2 are detachably connected. After wear occurs during prolonged contact and sliding between the sliding plate 1 and the first connecting beam, only the sliding plate 1 needs to be replaced, avoiding the need to replace the entire anti-fall beam device, thus saving costs. In this application, the base 2 is provided with a groove, and the sliding plate 1 is embedded in the groove to achieve a detachable connection between the sliding plate 1 and the base 2.

[0037] In the modular expansion joint of the present invention, when the supporting beam 10 undergoes longitudinal displacement with the bridge, the anti-falling beam device and the supporting beam 10 are orthogonal. The anti-falling beam device relies on the sliding plate 1 at the end of the base 2 to slide relative to the supporting beam 10, thereby achieving displacement. When the supporting beam 10 undergoes lateral displacement, the anti-falling beam device and the supporting beam 10 are obliquely intersecting. The anti-falling beam device undergoes displacement through the internal spherical cavity. The supporting rod 6 relies on the rotating part 7 to rotate relative to the base 2, thereby achieving displacement between the anti-falling beam device and the supporting beam 10, ensuring that the sliding plate 1 and the supporting beam 10 are in contact, thus ensuring that the supporting beam 10 rotates at the center position of the support 9. When the bridge is a suspension bridge or cable-stayed bridge or other floating system, the bridge will undergo large lateral displacement due to wind, or when an earthquake occurs, or when the bridge experiences abnormal conditions under special circumstances, the lateral displacement exceeds the design value. The supporting rod 6 and the limiting plate 4 collide, and the connecting piece 5 is sheared by shearing force, and the limiting plate 4 falls off, generating a larger rotation angle to meet the needs of abnormal working conditions. The modular expansion joint of the present invention can meet the needs of bridges under different working conditions and perform graded limiting treatment for different working conditions.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A beam-prevention device, installed on a modular expansion joint, characterized in that, The anti-fall beam device includes a sliding plate (1), a base (2), a cover plate (3), a limiting plate (4), a support rod (6), and a rotating part (7). The support rod (6) includes a first end (61) and a second end (62). The first end (61) is connected to the rotating part (7). One end of the base (2) is connected to the sliding plate (1), and the other end has an arc-shaped groove. The end of the base (2) facing the arc-shaped groove forms a first open end face (21). The first open end face (21) is connected to the cover plate (3). The cover plate (3) has a through hole inside. The cover plate (3) faces the... One end of the base (2) is a second open end face (31), and the other end away from the base (2) is a third open end face (32). The first open end face (21) and the second open end face (31) are connected. The arc groove and the first through hole form a spherical cavity. The spherical cavity is used to accommodate the rotating part (7), and the rotating part (7) can rotate inside the spherical cavity. The interior of the limiting plate (4) is provided with a through second through hole. The limiting plate (4) and the third open end face (32) are connected. The first end (61) passes through the second through hole, and there is a gap between the first end (61) and the second through hole.

2. The anti-falling beam device according to claim 1, characterized in that, The base (2), cover plate (3) and limiting plate (4) are connected by connector (5).

3. The anti-falling beam device according to claim 2, characterized in that, The connector (5) is provided with a bevel (51), which is located at the connection between the cover plate (3) and the limiting plate (4).

4. The anti-falling beam device according to claim 1, characterized in that, The surfaces of the arc groove and the rotating part (7) are treated with one or more of the following: thermal spraying of hard alloy or blackening.

5. The anti-falling beam device according to claim 1, characterized in that, The arc-shaped groove is hemispherical.

6. The anti-falling beam device according to claim 1, characterized in that, The material of the skateboard (1) is a polymer material, and any one of polytetrafluoroethylene, fiber composite material, ultra-high molecular weight polyethylene, or modified ultra-high molecular weight polyethylene is selected.

7. The anti-falling beam device according to claim 1, characterized in that, The skateboard (1) and the base (2) are detachably connected.

8. A modular expansion joint, characterized in that, The modular expansion joint adopts the anti-fall beam device according to any one of claims 1-7. The modular expansion joint includes a displacement box (8), a support (9), and a supporting beam (10). The supporting beam (10) is connected to the displacement box (8) through the support (9). Two anti-fall beam devices are provided and symmetrically arranged on both sides of the supporting beam (10). The sliding plate (1) is connected to the supporting beam (10). The support rod (6) is connected to the side plate of the displacement box (8).

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